Zobrazeno 1 - 10
of 20
pro vyhledávání: '"David B. Reiss"'
Autor:
David B. Reiss
Publikováno v:
SPIE Proceedings.
We conduct a comparative study of the performance of a variety of spatial filtering techniques for detecting small targets against infrared terrain backgrounds. We consider parametric and nonparametric filters as well as an example of a robust estima
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27a7f65ac83a9941ccf21d6c9610c183
https://doi.org/10.1117/12.179083
https://doi.org/10.1117/12.179083
Autor:
David B. Reiss
Publikováno v:
Physics Letters B. 115:217-220
We consider the possibility that the family group may be a spontaneously broken continuous global symmetry. In the context of grand unification, the couplings of the associated Goldstone bosons to fermions can be sufficiently suppressed so as to sati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a89b7b6564e2d67eda05a5267365e899
https://doi.org/10.1016/0370-2693(82)90647-5
https://doi.org/10.1016/0370-2693(82)90647-5
Publikováno v:
Physics Letters B. 116:227-230
We consider models in which the unbroken discrete subgroup of a Peccei-Quinn symmetry may be effectively embedded in the rest of the continuous symmetry group to avoid the formation of domain walls. In this context we may gain insight into the family
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bcf6590e14f814941f77f9c16a5b34d8
https://doi.org/10.1016/0370-2693(82)90331-8
https://doi.org/10.1016/0370-2693(82)90331-8
Autor:
Richard Holman, David B. Reiss
Publikováno v:
Physics Letters B. 166:305-310
We consider string theories with gauge group E 8 × E′ 8 compactified on Calabi-Yau manifolds so that the unified gauge group is E 6 × E′ 8 . If the fermion content is Ninf · 27 + δ (27 + 27 ), where δ = 1 or 2, and the E 6 is broken by Wilso
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08a57df1d2edff9bbb3f278f09564a47
https://doi.org/10.1016/0370-2693(86)90805-1
https://doi.org/10.1016/0370-2693(86)90805-1
Publikováno v:
Nuclear Physics B. 263:207-227
We investigate the weak-coupling expansion at high temperature for relativistic quantum field theories. Boson self-energies generally acquire a non-analytic dependence on the coupling due to the infrared plasmon effect. We show how to sum loops withi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::440633e58bb4f87a1a515fda4c88bf1a
https://doi.org/10.1016/0550-3213(86)90035-0
https://doi.org/10.1016/0550-3213(86)90035-0
Autor:
Richard Holman, David B. Reiss
Publikováno v:
Physics Letters B. 215:256-259
We show how the existence of a Nambu-Goldstone boson of the type recently argued for by Sikivie powerfully constrains possible models for grand unification. In particular, we show that the only models consistent with Sikivie's arguments are those in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc6736be5a48a349e2d7056808ae3c75
https://doi.org/10.1016/0370-2693(88)91430-x
https://doi.org/10.1016/0370-2693(88)91430-x
Publikováno v:
Nuclear Physics B. 177:456-460
The masses and lifetimes of very heavy weakly interacting fermions which appear in many grand unified gauge models are constrained by the requirement that their decays in the hot big bang early universe should not generate excessive entropy which wou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a63eec9c42cb9d6befbda84653cbc481
https://doi.org/10.1016/0550-3213(81)90180-2
https://doi.org/10.1016/0550-3213(81)90180-2
Publikováno v:
Physical Review Letters. 50:317-320
A grand unified model is proposed which incorporates a ''peculiar'' photon in addition to the familiar photon. The model is constructed to reconcile the possible observations of fractional charges and monopoles. One way to have the weak-mixing-angle
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b49bd9de55bcae0a41e30be8c3cf039
https://doi.org/10.1103/physrevlett.50.317
https://doi.org/10.1103/physrevlett.50.317
Publikováno v:
Nuclear Physics B. 320:401-439
We consider the rules for string model building in the free fermionic formalism. Valid spin-structures on the string world-sheet correspond to automorphisms of the Lie algebra of the world-sheet supercharge. After reviewing and clarifying the model b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34dc69caaf8411eb170a760f726bcf9d
https://doi.org/10.1016/0550-3213(89)90256-3
https://doi.org/10.1016/0550-3213(89)90256-3
Publikováno v:
Nuclear Physics B. 199:223-268
We present in detail a grand unified model based on SO(10) which naturally reproduces known fermion mass relations and mixing angles. It predicts m ν e ⪡ m ν μ , m ν τ , and predominant ν μ - ν τ oscillations. Several other features of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9688c8f8acecacd388808e186b3f9ae7
https://doi.org/10.1016/0550-3213(82)90346-7
https://doi.org/10.1016/0550-3213(82)90346-7